EP0122667A1 - Wärmetauscher und Zentralheizungskessel mit einem solchen Wärmetauscher - Google Patents

Wärmetauscher und Zentralheizungskessel mit einem solchen Wärmetauscher Download PDF

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Publication number
EP0122667A1
EP0122667A1 EP84200489A EP84200489A EP0122667A1 EP 0122667 A1 EP0122667 A1 EP 0122667A1 EP 84200489 A EP84200489 A EP 84200489A EP 84200489 A EP84200489 A EP 84200489A EP 0122667 A1 EP0122667 A1 EP 0122667A1
Authority
EP
European Patent Office
Prior art keywords
tube
heat exchanger
staves
separating
lips
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP84200489A
Other languages
English (en)
French (fr)
Inventor
Petrus Johannus Remmen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AWB Apparatenfabriek Warmtebouw BV
Original Assignee
AWB Apparatenfabriek Warmtebouw BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AWB Apparatenfabriek Warmtebouw BV filed Critical AWB Apparatenfabriek Warmtebouw BV
Publication of EP0122667A1 publication Critical patent/EP0122667A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0026—Guiding means in combustion gas channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F28F1/325—Fins with openings

Definitions

  • the invention relates to a heat exchanger comprising a tube meant for the transfer of heat and separating the through-flow space for the heating fluid from the one for the fluid to be heated, said tube consisting of metal staves which are welded to one another and have each an L-, a U-, a Z-, a T-, an I-shaped or other transverse section, of each one of said staves a leg or a flange extending in the circumferential wall of the separating tube and being welded with a free longitudinal edge to a corner edge which extends also in said wall or to an other free longitudinal edge,which extends in said wall,of the respective adjacent stave and the other leg or the web without or with a second flange forming a longitudinal fin which projects into the separating tube, and also to a central heating boiler comprising such a heat exchanger.
  • the heat exchanger described hereabove and the central heating boiler provided therewith are disclosed in the French patent specification 1.250.235.
  • the invention has the object to increase the ability of the separating tube to transfer heat, so that when the capacity of the heat exchanger remains unchanged less staves are required in the separating tube, whereby the diameter of said tube, consequently, also that of a central heating boiler provided therewith may be reduced.
  • this is achieved in that locally lips are forced out of said fin and said lips remain with one edge connected with said fin and are bent out of the plane thereof.
  • These lips have the effect that they break the boundary layer of the fluid flowing in the separating tube along the surface of the staves, consequently, cause turbulence in said fluid, whereby per unit of time more fluid comes directly into contact with the staves of the separating tube and more heat is delivered or taken up.
  • the heat transferring area of the separating tube is enlarged by the area of the narrow sides of the lips and those of the holes formed in the staves, said latter areas being determined by the thickness of the metal of the longitudinal fins and also assist the heat transfer. Furthermore, due to the smaller diameters a considerable saving of material is possible.
  • a central heating boiler comprising a heat exchanger according to the invention, a water jacket provided round the separating tube consisting of staves and forming part of the heat exchanger and a gas or oil burner located in front of one end of said tube, the flue gas from said burner flowing through the separating tube, has the advantage that, due to the small diameter of the separating tube, the radial dimension of the water jacket must be chosen greater than usual to satisfy the required water volume in the boiler. This results in that the annular end walls obtain without special measures radial dimensions which are so large as to enable said end walls to take up the thermal stresses which occur in a boiler provided with a separating tube which consists of staves and, as a consequence thereof, has become very rigid.
  • the central heating boiler shown in Figs.1 and 2 comprises a furnace 1, a gas or oil burner 2 located therein, a heat exchanger 3 and a flue gas collecting space 4, which is bounded by a detachable cap 5 provided with an opening 6 adapted to be connected to a chimney.
  • the heat exchanger consists of a separating tube formed of staves 7 which are welded to one another and have an L- or angle-shaped transverse profile (see Figs.2,3 and 4), said separating tube being provided between the flue gas passage 8 which extends between the furnace 1 and the flue gas collecting space 4 and a water jacket 9 which is bounded on the outer circumference by a straight cylindrical tube 10, at the upper end by a flat ring 11 and at the lower end by a wall 12 surrounding the furnace 1.
  • the staves 7 with their L- or angle-shaped transverse profile have legs which are welded to one another at 13 and extend in the peripheral wall of the separating tube and other legs which form inwards pointing fins. It appears from Figs.2,3 and 4 that lips 14 are locally forced out of each one of these fins, said lips remaining each connected with one edge with the respective fin and being bent out of the plane thereof. These fins break the boundary layer of the flue gas flowing along the staves 7, whereby more flue gas flowing through the separating tube directly contact the staves and due to that a better heat transfer is obtained. Also the heat transferring area of the separating wall is enlarged by the narrow sides 15 of the lips 14 and the narrow sides 16 of the openings formed in the fins by the forced out lips and this improves the heat transfer too.
  • the ability of the separating tube to transfer heat is so much better than that of the known separating tubes consisting of staves that for the same capacity the diameter of said separating tube can be considerably reduced.
  • the water jacket of, for instance, the boiler shown in Figs.1 and 2 must be chosen somewhat more spacious in order that the water jacket of the boiler will have a sufficient volume.
  • the radial dimensions of the water jacket 9 and those of the end wall 11 may be made so large, as to enable said end wall and its welds to take up without further measures the thermal stresses causes by welding together the separating tube consisting of stiff staves 7 one one hand and the remaining parts 10,11,12 of the heat exchanger consisting of thin sheet steel on the other hand.
  • the lips 14 are located only in the second half of the length of the staves seen in the direction of flow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Geometry (AREA)
  • Details Of Fluid Heaters (AREA)
EP84200489A 1983-04-15 1984-04-05 Wärmetauscher und Zentralheizungskessel mit einem solchen Wärmetauscher Withdrawn EP0122667A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8301329A NL8301329A (nl) 1983-04-15 1983-04-15 Warmtewisselaar en centrale verwarmingsketel met zulk een warmtewisselaar.
NL8301329 1983-04-15

Publications (1)

Publication Number Publication Date
EP0122667A1 true EP0122667A1 (de) 1984-10-24

Family

ID=19841706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84200489A Withdrawn EP0122667A1 (de) 1983-04-15 1984-04-05 Wärmetauscher und Zentralheizungskessel mit einem solchen Wärmetauscher

Country Status (4)

Country Link
EP (1) EP0122667A1 (de)
KR (1) KR840008498A (de)
DK (1) DK190984A (de)
NL (1) NL8301329A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996019707A1 (en) * 1994-12-22 1996-06-27 Helpman Intellectual Properties B.V. Device for enhancing heat transfer between a plate and a medium
JP2015121367A (ja) * 2013-12-24 2015-07-02 株式会社パロマ 熱交換器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL98349C (de) * 1900-01-01
GB1004552A (en) * 1964-04-17 1965-09-15 Gunter Fuchs Improved boiler
GB1149884A (en) * 1965-10-24 1969-04-23 Borg Warner Heat exchanger fin and method of making same
DE2462595B1 (de) * 1974-03-16 1979-04-26 Haas & Sohn Ernst W OEl- oder gasbeheizter Heizungskessel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL98349C (de) * 1900-01-01
GB1004552A (en) * 1964-04-17 1965-09-15 Gunter Fuchs Improved boiler
GB1149884A (en) * 1965-10-24 1969-04-23 Borg Warner Heat exchanger fin and method of making same
DE2462595B1 (de) * 1974-03-16 1979-04-26 Haas & Sohn Ernst W OEl- oder gasbeheizter Heizungskessel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996019707A1 (en) * 1994-12-22 1996-06-27 Helpman Intellectual Properties B.V. Device for enhancing heat transfer between a plate and a medium
NL9402186A (nl) * 1994-12-22 1996-08-01 Helpman Intellectual Propertie Inrichting voor het bevorderen van warmteoverdracht tussen een plaat en een medium.
JP2015121367A (ja) * 2013-12-24 2015-07-02 株式会社パロマ 熱交換器

Also Published As

Publication number Publication date
KR840008498A (ko) 1984-12-15
DK190984A (da) 1984-10-16
NL8301329A (nl) 1984-11-01
DK190984D0 (da) 1984-04-12

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19840918

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19850703

RIN1 Information on inventor provided before grant (corrected)

Inventor name: REMMEN, PETRUS JOHANNUS